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Table bridge

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Table bridge

Animation of operation
Ancestor	Plate girder bridge,
Related	Lift bridge, bascule bridge, submersible bridge
Descendant	None
Carries	Automobile, pedestrians
Span range	Short
Material	Steel
Movable	Yes
Design effort	Medium
Falsework required	No

Atable bridge is one of the types of moveable bridge in which the deck moves vertically. Two or four hydraulic pillars under the bridge, one or two at each end, raise the bridge deck to allow barge traffic to pass beneath it.^[1] In contrast to a lift bridge, where the deck is pulled upwards along towers, the deck of a table bridge is pushed upwards by otherwise hidden pillars.^[2] The name originates from the fact that when open it resembles a table.

The total space required by a table bridge is hardly larger than the bridge deck, which is not the case with a thrust bridge. Unlike a lift bridge this type has only slight visual impact upon its surroundings when closed for use by road traffic. This is very well demonstrated by the Pont levant Notre DameatTournaiinBelgium.

Examples of table bridges[edit]

Several rivers and waterways are home to multiple examples of table bridges. These include but are not limited to:

• Erie CanalinNew York between Lockport and the Genesee River is home to one of the largest collection of table bridges
• Gulf Intracoastal Waterway between the Judge Perez BridgeinLouisiana and the Veterans Memorial BridgeinTexas (including Bayou Lafourche and Bayou Terrebonne in Louisiana) features several table bridges
• Trent-Severn WaterwayinOntario; both table bridges and bobtail swing bridges are located along its entire length
• Multiple road bridges in Milwaukee, Wisconsin

A table bridge in operation[edit]

Three views of the Pont levant Notre-Dame on the Scheldt River at Tournai, Belgium

See also[edit]

• Moveable bridges for a list of other movable bridge types
• Submersible bridge for a similar bridge that disappears by moving down

References[edit]